ENGINE 113, 137 (except 113.99)

1 Electrical connection 2 Sensor housing 3 Active ceramic probe body 4 Electrode (inner) 5 Electrode (outer) 6 Heating element 7 Inner, open combustion chamber 8 Protective tube 9 View of electrical connection for O2sensor 1 Sensor heater 2 Sensor heater ground 3 O2 sensor signal ground 4 O2 sensor signal G3/2 O2 sensor upstream of TWC G3/3 Left O2 sensor upstream of TWC G3/4 O2Right O2 sensor upstream TWC [KAT] (further designations according to model and location e.g. G3/1 O2 sensor downstream of TWC G3/5 Left O2 sensor downstream of TWC G3/6 Right O2sensor downstream of TWC)
		P07.61-0404-03

	O2 sensors, location		GF07.04-P-4103-02K
	O2 sensors, task	Records the residual oxygen in the exhaust gas and sends a signal to the engine control unit. O2-sensors upstream of the catalytic converter: The O2-sensor signal is needed for Lambda control Self adaptation of the mixture formation Function chain tests. O2-sensors downstream of the catalytic converter: The O2-sensor signal is needed for Two-sensor control and EURO3/4 Monitoring catalytic converter efficiency
	O2 sensor design	Finger sensor Engine 113, 137	GF07.04-P-4103-03F
	O2 sensors function		GF07.04-P-4103-01F